1. Optimum allocation in stratified surveys: Stochastic programming
2. Haseen, S., Iftekhar, S., Ahsan, M.J. and Bari, A. A Fuzzy Approach for Solving Double Sampling Design in Presence of Non-Response, International Journal of Engineering Science and Technology, 4, 2012, 2542-2551.
3. Compromise Allocation for Combined Ratio Estimates of Population Means of a Multivariate Stratified Population Using Double Sampling in Presence of Non-Response
4. Javaid, S., Bakhshi, Z. H. and Khalid, M. M. Optimum allocation in Stratified Sampling with random costs, International Review of Pure and Applied Mathematics, 5(2), 2009, 363-370.
5. Kall, P., Wallace, S.W. Stochastic programming, Wiley, New York. 1994.